Accelerator and brake control



26 x 'IIIIIIIIIIIIIII/IIA\$Q Aprilv 1942- J. L. SIESENNOP 2,280,859

ACCELERATOR AND BRAKE CONTROL; Filed June 21, 1940 2 Sheets-Sheet l Inv1:111: 131' ..I.L.St=5annup April J. SIESENNOP 2,280,859

ACCELERATOR AND BRAKE CONTROL Filed June 21, 1940 2 Sheets-Sheet 2fi't-tmr nega Patented Apr. 28, 1942 UNITED STATES PATENT OFFICEACCELERATOR AND BRAKE CONTROL John L. Siesennop, Milwaukee, Wis.

Application June 21, 1940, Serial No.'341,603

4 Claims.

sure the smooth and effective functioning of L said mechanism under allconditions.

Another important object of my invention is to provide a single pedalcontrol mechanism for the brakes and accelerator of an automobile,

which can be easily installed as a unit on the 1 automobile withoutmaterial change in the brake mechanism and accelerator mechanism nowfound on automobiles.

A further object of my invention is to provide an improved mechanism forrendering the operating device for the accelerator inoperative when thebrakes are applied, so as to effectively prevent the inadvertentoperation of said accelerator during the applying of the brakes.

With these and other objects in view, the invention consists in thenovel construction, arrangement, and formation of parts, as will behereinafter more specifically described, claimed, and illustrated in theaccompanying drawings, in which drawings:

Figure 1 is a fragmentary, longitudinal, sectional view through anautomobile illustrating my improved device for controlling theaccelerator and brakes of an automobile, the parts being shown in theirnormal positions before actuation.

Figure 2 is an enlarged, detail, fragmentary, sectional viewillustrating my single pedal control and showing the pedal depressed forapplying the brakes, with the accelerator actuating mechanism moved toits inoperative position.

Figure 3 is an enlarged, detail, sectional view taken on the line 3-3 ofFigure 2, looking in the direction of the arrows, showing the swingingU-shaped operating frame for moving the accelerator actuating mechanismto an inoperative position during the applying of the brakes.

Figure 4 is a detail, transverse, sectional View taken on the line 44 ofFigure 2, looking in the direction of the arrows, illustrating the meansfor rockably mounting the swinging U- shaped frame from the floor boardsof an automobile.

Figure 5 is a view similar to Figure 4, but taken on the line 55 ofFigure 1, looking in the direction of the arrows, and illustrating theactuating means for the throttle valve or accelerator.

Figure 6 is a detail sectional view taken on the line B6 of Figure 2,locking in the direction of the arrows, illustrating a part of theaccelerator actuating mechanism.

Referring to the drawings in detail, wherein similar referencecharacters designate corresponding parts throughout the several views,the letter P generally indicates my novel mechanism for bringing aboutthe operation of a carburetor C for an internal combustion engine E andthe brake mechanism B of an automobile A.

My novel pedal mechanism P merely discloses one preferred form of myinvention, and various changes in details can be made thereto, and it isto be understood that the same can be altered to suit the. particulartype of brake mechanism and carburetor on different makes ofautomobiles.

Only a fragment of the automobile A has been shown, and, as illustrated,the automobile includes the footboards I0 arranged in front of theinternal combustion engine E. The brake mechanism B is disposed belowthe floor boards, and the brakes can be considered as of the hydraulictype now commonly used on automobiles on the market. Details of thebrake mechanism B are not shown in detail, but, as illustrated, the sameinclude the master cylinder l I having a piston rod I2 for compressingthe fluid in the master cylinder and for forcing such fluid to theindividual wheel brake applying structures.

The engine E is of the usual type, and the carburetor C, in the presentinstance, is of the downdraft character and includes a crank lever l3for the butterfly or throttle valve of the englue. The throttle valvecrank 53 is normally held in an idling position by a coil spring l4.During the speeding up of the engine, the crank I3 is moved to the left(see Figure 3) against the tension of the spring Hi.

My novel pedal mechanism P includes the treadle proper I5 having anelongated toe plate 86 hingedly secured, as at ll, to a heel plate iii.The heel plate can be of the same character as that shown in mymentioned pending application, and the toe plate i6 is normally held ina raised position relative to the heel plate by a leaf spring I8. Apositive stop 2c is connected with the lower face of the heel plate it,so as to limit the downward swinging movement of the toe plate Itrelative to said heel plate. The heel plate 18 has rigidly connectedthereto the depending brake operating push rod 2i, and this push rodextends through a guide sleeve 22 carried by a cup 23 rigidly connectedto a supporting base 24. This supporting base 24 is secured to theundersurface of the floor boards It] in any desired way, such as by theuse of bolts 25. An expansion coil spring 26 is placed about the pushrod 2! and is confined between the heel plate l8 and the cup 23 fornormally holding the heel plate in a raised, elevated position.

The toe plate l adjacent its forward end carries a push rod 21 for theaccelerator operating mechanism. The accelerator push rod 21 is threadedinto a socket 28 hingedly connected, as at 29, to the lower face of thetoe plate It. A lock nut 30 holds the accelerator push rod 2i in apreferred adjusted position.

Arranged below the supporting base 24 is a swinging U-shaped operatingframe, 3i. frame is supported adjacent its rear end by swinging links32, which are pivotally connected, as at 33, to a supporting base 24,The front of the U.shaped frame is'supported by swinging links 34, whichare pivotally connected to the base 24. by means of a pivot pin 35. Thebolt 36. employed for pivotally connecting the swinging links 32 withthe frame 3|, also rotatably supports the anti-friction roller 3], thepurpose of whichwill be later set forth,

Rockably carried by the extremeforward end of, the frame 3| is a guideblock 38, and this. guide block 38 slidably receives the acceleratorpush rod 21. By referring to Figure 3, it will be noted that the guideblock 33 carries outwardly extending pintles 39, which are rotatablymounted in bearing openings formed in the side walls or legs of theU-shaped frame St.

The accelerator push rod 21 extends through and below the guide block 38and is adapted to engage a laterally extending foot, 40 formed on alever 4|. This lever 4| is rigidly secured to a crankshaft 42, which isrotatably mounted ina hanger bracket 43 depending from the base 24.Thecrankshaft 42 has formed thereon or otherwise secured thereto acrankarm M, and the forward end of the crankarm has, in turn, pivotallyconnected thereto the pull rod 4-5. This pull r'od extends toward thecarburetor C and is pivotally connected to the outer end of the throttleor accelerator valve lever l3.

From the description so far, it can be seen that i when a downwardpushis exerted on the toe plate IS, a downwardthrust will be exerted onthe accelerator push rod 2?, and as this push rod normally engages thefoot 493, the lever M will be actuated, causing corresponding move.-

ment of the crank shaft 42. This will pull back on the pull rod 45 andopen the throttle oraccelerator valve of the carburetor. A relativelyheavy contractile coil spring 46 is connected to a pivot bolt 41employed for pivotally connecting the links 36 with the swinging frame3| and to on a pin 50 carried by a bracket 5| secured to the floorboards ID of the automobile. The rear This end of the lever 49 hasformed therein a foot 52 for engaging the brake plunger rod l2, and theforward end of the lever 49 has formed thereon a sector gear or pinion53, the teeth of which mesh with the teeth of a rack bar 54 formed onthe push rod 21.

Upon downward thrust on the heel plate l8, the rack bar 54 will causemovement of the double-ended lever 43, and this lever will push againstthe brake plunger rod I2, causing the applying of the brakes.

Upon initial downward movement of the brake push rod 2|, the cam track48 will engage the anti-friction roller 31, and cause forward movementof the swinging frame 3| against the tension of the coil spring it. Thismovement will cause the carrying of the accelerator push rod 2! off thefoot 40 of the accelerator lever 4|, and, consequently, operation of thethrottle valve will be prevented during the applying of the brakes.After the initial movement of the heel plate [8, the entire pedal can bedepressed without causing the actuation of the throttle valve.

From the foregoin description it can be seen that I have provided. anexceptionally simplev and durable mechanism for bringing about theoperation. of the brakes and throttle valve from a single foot pedalmechanism.

Changes in details may be madev without departing from the spirit or thescope of this invention, but what I claim as new is:

1. The combination with an automobile having a brake mechanism and anengine having a.

carburetor provided with a throttle valve and an operating crank: atreadiemechanism including a hingedly connectedheel and toe plate, meansfor actuating the brake mechanism from ,theheel.

plate, including a push rod,ra swinging, frame, means for operating thethrottle valve from the toe plate, including an acceleratorpush rod.pivotally connected, to the toe plate, and arswinging.

crank lever disposed below the accelerator, push rod, a guide on theswinging, frame for the accelerator push rod, a cam track on. the brakepush rod, a roller on the swinging, frame, and

resilient, means normally holding the forward,

end of the frame in a raised position with the frame back toward thebrake push rod, and.the-

accelerator push rod on said lever, and the roller against the brakepush rod, whereby upon down ward movement. of the brake push rod, thecam track will force theroller and swinging frameforward and theaccelerator push rod off the lever.

2. The combination with an automobile having a brake mechanism, anengine including a carburetor provided with a throttle, valve andaswinging frame for operating the same: atreadle, mechanism including ahingedly. connectedheel. and toe plate, means for actuating the brakemechanism from the heel plate, including a brake. push rod, a camtrackformed onthe push rod intermediate its ends,lmeans for actuating.the crank of the throttle. valve, from the toe plate,

including an accelerator. push rod pivotally secured to the toe plateadjacent its forward end, and a swinging lever having, operativeconnection with the crank of the throttle valve, a swinging frame, frontand rear pairs; of links pivnected with the swinging frame normallyholding the swinging frame in a raised position with the anti-frictionroller against the brake push rod and cam track, as and for the purposespecified.

3. The combination with an automobile having a brake mechanism, and anengine provided with a carburetor, and including a throttle valve havingan operating crank: a treadle mechanism including a hingedly connectedheel and toe plate, means for actuating the brake mechanism from theheel plate, including a brake push rod secured to the heel plate anddepending therefrom, a cam track on said push rod, and means foroperating the crank for the throttle valve from the toe plate, includingan accelerator push rod pivotally secured to the toe plate adjacent theforward end thereof, a crank shaft, a crankarm on the shaft operativelyconnected to the throttle crank, and a lever on said crankshaft having afoot normally disposed under the accelerator push rod, a swinging frame,front and rear pairs of links pivotally supporting the frame, a guideblock rockably carried by the forward end of the swinging frame slidablyreceiving the accelerator push rod, an anti-friction roller on the frameengaging the brake push rod and its guide track,

and spring means connected with the frame normally holding the forwardend of the frame in a raised position, and the frame back, with theanti-friction roller in engagement with the push rod, and theaccelerator push rod above and in engagement with the foot of the lever.

4. The combination with an automobile having a brake mechanism, and anengine provided with a carburetor including a throttle valve and aswinging crank for operating the same: a single treadle means foractuating the brake mechanism and carburetor, including a hingedlyconnected heel and toe plate, means for operating the brake mechanismfrom the heel plate, including a brake push rod, a rack bar on said pushrod, means for actuating the throttle valve from the toe plate,including an accelerator push rod pivotally connected with said toeplate, and a swinging lever operatively connected to the throttle valvecrank, the accelerator push rod normally engaging the outer end of theswinging lever, means for moving the accelerator push rod off said leverupon downward movement of the brake push rod, a double-ended brakeoperating lever, and a sector gear on said double-ended brake operatinglever meshing with the rack bar of the brake push lever.

JOHN L. SIESENNOP.

